package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 从前端传来的密码进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     */

    @Override
    public void insertEmp(  EmployeeDTO employeeDTO) {
        Employee employee =new Employee();
        //调用BeanUtils工具类
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置更新创建时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置初始密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置状态  1为启用 0为禁用
        employee.setStatus(StatusConstant.ENABLE);
        //TODO 设置创建对象
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        BaseContext.removeCurrentId();
        //调用mapper层新增对象
        employeeMapper.insertEmp(employee);

    }

    @Override
    public PageResult EmpSelect(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.selectEmp(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    /**
     * 更新员工
     */

    @Override
    public void update(Long id ,Integer status) {
        //方便以后直接使用，所以封装成emp对象
        Employee emp = Employee.builder().id(id)
                .status(status).build();
        //调用mapper接
        employeeMapper.update(emp);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Integer id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //通过调用BeanUtils工具类，将employeeDTo的属性值赋值给employee
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置修改时间
        employee.setUpdateTime(LocalDateTime.now());
        //从localThread中获取修改人的id
        employee.setUpdateUser(BaseContext.getCurrentId());
        BaseContext.removeCurrentId();
        employeeMapper.update(employee);
    }
}
